Bottle stopper



FIG. 1 is a perspective view of a bottle stopper showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is an elevational view thereof, the view being the same from all directions;

FIG. 5 is an elevational view thereof illustrating a movable internal component visible through a transparent section of the stopper, the view being the same from all directions; and,

FIG. 6 is an elevational view thereof illustrating a different position of the movable internal component visible through the transparent section of the stopper, the view being the same from all directions. 

The ornamental design for a bottle stopper, as shown and described. 